气候变化领域集成服务门户(CCPortal): Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime

CCPortal

DOI	10.1029/2019JD031157
	Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime
	Jin D.; Oreopoulos L.; Lee D.; Tan J.; Kim K.-M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:6
英文摘要	We employ the cloud regime concept to identify large-scale tropical convective systems and investigate their characteristics in terms of organization and precipitation. The tropical cloud regimes (TCRs) are derived from Moderate Resolution Imaging Spectroradiometer cloud optical thickness and cloud top pressure two-dimensional joint histograms. We focus on the TCRs that have relatively low cloud top pressures and high cloud optical thicknesses, as well as heavy precipitation, namely, TCR1 (convective core-dominant), TCR2 (various high clouds), and TCR3 (anvils). The horizontal size of aggregates of TCR1, TCR2, or TCR3 occurrences (TCR123) is identified as the number of contiguous 1° × 1° grid cells occupied by either of these three TCRs. For the small- to intermediate-size aggregates (TCR123 size 20 to 160 one-degree grid cells), there is large variability in the fraction of the aggregate each TCR occupies, but generally, TCR2 exhibits the highest fraction. As the total system size grows, the variability shrinks and for the largest systems ratios eventually converge to 0.3, 0.2, and 0.5 for TCR1, TCR2, and TCR3, respectively. The mean precipitation of convective core-rich TCR1 is generally high for the systems of intermediate size (80–160 one-degree grid cells) but with the highest mean coming from smaller systems of 20–40 grid cells. For the largest systems, their mean precipitation in areas containing cores (TCR1) are relatively low with suppressed variation. The mean precipitation rates of TCR2 and TCR3 in a TCR123 aggregate tend to be stronger when accompanying TCR1 mean precipitation rate is also high. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	tropical convection, cloud-precipitation, synoptic scale, cloud regime
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186110
作者单位	Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; GESTAR, Morgan State University, Baltimore, MD, United States
推荐引用方式 GB/T 7714	Jin D.,Oreopoulos L.,Lee D.,et al. Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime[J],2020,125(6).
APA	Jin D.,Oreopoulos L.,Lee D.,Tan J.,&Kim K.-M..(2020).Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime.Journal of Geophysical Research: Atmospheres,125(6).
MLA	Jin D.,et al."Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime".Journal of Geophysical Research: Atmospheres 125.6(2020).